Felix Cavaliere and Eddie Brigati of The Rascals wrote this song after they realized that because of their work schedule, they could see their girlfriends only on Sunday afternoons. It's implied that these Sunday afternoons are spent with a nice romp. Cavaliere told Seth Swirsky
, who was shooting footage for his documentary Beatles Stories
, "I met this young girl and I just fell head over heels in love. I was so gone that this joyous, wonderful emotion came into the music. Groovin' was part of that experience. If you look at the story line, it's very simple: we're groovin' on a Sunday afternoon because Friday and Saturdays are when musicians work. The simplicity of it is that Sundays you could be with your loved one. And the beauty of is this joyous bliss that at that time I equated with a person, but that's the beauty of music - when it's an example of what you do it lasts forever. You're in love forever because of that moment in time that you captured, and that's what was happening with Groovin'."